Air-cooled valve-stem guide and bushing



Feb. 24, 1931. w. H. BQICE 1,793,581

AIR COOLE'D VALVE STEM GUIDE AND BUSHING Filed Oct. 8, 1928 l g/II/fil I.

iNVENTOR.

mile? ,BI CG. a 1 BY Patented Feb. 24,1931

Unites stares retal- WALTER H. men, or nn'rno nrrionrenn j AIR-ocean's VALVE-STEM earns Ann-Bummer Application filed embels, 192s. j Serial at. 810,978.

My invention relates to a new and useful improvement in an air cooled valve stem guide'and bushing of a type in which the bushing is self-sealed on the valve stem It is an object of the present invention to prevent warping of the valve stems and bushings used therewith.

It is another object of the invention to provide a bushing which may be economically l0 manufactured, which will be durable and highly efficient in use, and which may be easily and quickly assembled.

It is another object ofthe present invention to provide a bushing of this class whereby Fig. 1 is a central vertical sectional view of the invention applied.

Fig. 2 is a fragmentary sectional viewof a multi-cylinder engine showing the invention 7 applied. 3 Fig. 3 is a sectional view taken on line 33 of Fig. 1.

Fig. 4 is a fragmentary sectional vie-w of an overhead type of engine showing the inven ion applied.

In the drawings I have shown the invention' applied to an engine having a head 7 and a port 8 closed by the valve 9 and provided. with a push rod guide 10, in which the push rod 11 reciprocates. Projecting from the face of the valve 9 in embracing relation to the valve stem 12, is a conical apron 13. Slidably engaging in the push rod guide 10 is plug 14, in which is threaded the end of the valve stem 12, which is provided with the lock nut 15, so that adjustment of the valve stem, by moving the plug 1 f relatively to the end of the push rod 11, may be eifected.

A bushing 16 is threaded on to the inward projection 17 and provided with a recess 18 inwhich engages the bushing, this bushing,

, currents of air may be led into the engine comprising the conical member 19 andthe conical member 20, eachhaving the outwardly tu'rned flanges 22 and 21, respectively. The valve stem is fluted as at 23, this fluted portion projecting throhghthehe'adQd and the head 25, solder '26. orI-other-suitable afllxing means being positioned between the heads about the fluted. portion of the valve stem. The spring 27 engages the plug 14 and functions in the usual manner. An air conduit or so passage 28 is provided with thefunnel 29, through which air may be directed by the fan or otherwise so as to pass into the interior of the member19 for cooling purposes, a

baffle 30 with baffles'31 being positioned in the '6 gpathof the air for retarding its progress.

In disassembling, the bushing 16 may be removed and all of the parts easily and quiclrly removed, so that a 'mlnimum amount of time for assembling and disassemblingis 7 required. v

y In F1g. 4 I have shown the invention applied tothe overhead valve type of engine in which the plug 14 functions, as doesthe plug let, the rest of the parts being as already 7 described and merelyin inverted position.

While I have illustrated and described the preferred form of structured do not wish to limit myself to'the precise form of structure shown, but desire to avail myself of such 8e variations and modifications as come within the scope of the appended claims. Having thus described my invention what I claim as new and desire to secure by Letters the open end communicating with said chamber.

2. A device of the class described adapted for use with an engine having an air conduit formed thereinv comprising a valve stem bushv formed conical and closed at its lower end an embracing said valve stem,- the open end of said bushing communicating witn said conduit.

3. A valve guide and bushing of the class described comprising a cup shaped bushing P a headforrned at one end of said bushing and serving as a closure therefore and em- 7 bracing said valve stem; and an outwardly projecting flange at the other end of said' bushing.

l. A device of the class described, comprising: a valve stem; a valve stem guide and bushing mounted on said valve steni'and comprising a conical member embracing said.

valve stem, said valve stem being axiallyslidable therein; and means for preventing-mtation of sald-bushln'g' about sald valve stem,

the smaller end of said bushing being closed; 5. In combination with a valve havlng a valve stem: a bushing embracing said stem 7 at one end and being closed, the other end of said bushing being larger in cross sectional area and being op'en.'

In testnnony whereof I havesl gned the foregolng speclficatlon. l

WALTER 11.31012. 

